Frankfurt Airport (FRA)
The Frankfurt Airport is served by more than 1000 flights each day to and from nearly 300 destinations in over 100 countries. It is well connected to Mainz by the regular local train service.
To take a train to Mainz, follow the signs to the "Regionalbahnhof / local trains" at the airport to get to the regional train station. Tickets can be purchased at the ticket vending machines at the train station. Please note that they only accept coins or banknotes of up to 20€. The correct ticket is called "Einzelfahrkarte nach 6500" (which is Mainz/Wiesbaden) and costs 4.65€ per person.
The local train "S8" to "Mainz Hauptbahnhof" (Mainz Central Station) is the easiest option, which departs every 30 minutes during day time. Alternatively, you may take any regional train ("Regionalbahn/RB" or "Regionalexpress/RE") stopping at Mainz Hauptbahnhof.
Hahn Airport (HHN)
The Frankfurt Hahn Airport is served by European budget airline Ryanair. There is a non-stop coach service to Mainz Central Station (bus stop "N") leaving from the airport coach station ("Busbahnhof").
To get to the coach station, turn right when leaving the terminal and walk past the parking lot. The coach fare is 13.50€ payable to the driver.
The german railway network provides a very comfortable, cost-effective and environmentally conscious way to travel. There are two classes, the slightly more comfortable and significantly more expensive first class ("1./Erste Klasse") and the normal second class ("2./Zweite Klasse").
Tickets can be purchased online via the web services of the Deutsche Bahn. If the expected total for your railway tickets exceeds 100€, you may want to consider the purchase of a "Probe BahnCard 25" for 19€, granting you a 25% reduction to all second class railway tickets for four months.
To find all the possible connections to any location in the Rhein-Main area, the best way is to use the web services of the local transport association "Rhein-Main-Verkehrsbund", or short RMV, provided through their website www.rmv.de/en/ or with a smartphone app available for Android and iOS.